scan avec malwarebyte effectué aisi que rebootage du pc et visiblement antispyware semble avoir été supprimé :)
Je tiens à te remercier destrio5 pour ton aide car sans toi ça aurait été la cata...^^
je te poste à titre facultatif le rapport de malwarebyte ci-dessous.

Malwarebytes' Anti-Malware 1.20
Version de la base de données: 931
Windows 5.1.2600 Service Pack 2

15:37:30 08/07/2008
mbam-log-7-8-2008 (15-37-23).txt

Type de recherche: Examen complet (C:\|D:\|)
Eléments examinés: 102859
Temps écoulé: 22 minute(s), 2 second(s)

Processus mémoire infecté(s): 0
Module(s) mémoire infecté(s): 1
Clé(s) du Registre infectée(s): 13
Valeur(s) du Registre infectée(s): 3
Elément(s) de données du Registre infecté(s): 15
Dossier(s) infecté(s): 0
Fichier(s) infecté(s): 12

Processus mémoire infecté(s):
(Aucun élément nuisible détecté)

Module(s) mémoire infecté(s):
C:\WINDOWS\axrfgvek.dll (Trojan.FakeAlert) -> No action taken.

Clé(s) du Registre infectée(s):
HKEY_CLASSES_ROOT\Interface\{13326a44-bd50-43de-a488-017d62069762} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\Interface\{8d079e66-20db-43ca-944a-1d2dd027b351} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\Typelib\{2e79cd45-1f7d-434b-b48d-4b8fcd60e055} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\CLSID\{c396242e-b6b6-4b05-a755-72938f31acb0} (Trojan.FakeAlert) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{c396242e-b6b6-4b05-a755-72938f31acb0} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\Interface\{a6e487b0-3409-44cb-9c63-c35e8a421c5f} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\Typelib\{8c238094-6aa8-4964-a804-fdb7b29018fb} (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\CLSID\{136717a3-da9a-4322-997b-25d0843942f8} (Trojan.FakeAlert) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\webvideo (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\CLSID\{54eefdfc-0d0e-4623-9ea1-ced7127a5632} (Trojan.FakeAlert) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VSPlugin (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\nqgpedlr.btme (Trojan.FakeAlert) -> No action taken.
HKEY_CLASSES_ROOT\nqgpedlr.toolbar.1 (Trojan.FakeAlert) -> No action taken.

Valeur(s) du Registre infectée(s):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar\{136717a3-da9a-4322-997b-25d0843942f8} (Trojan.FakeAlert) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Desktop\Components\0\source (Trojan.FakeAlert) -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\axrfgvek (Trojan.FakeAlert) -> No action taken.

Elément(s) de données du Registre infecté(s):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProductId (Trojan.FakeAlert) -> Bad: (VIRUS ALERT!) Good: (55639-OEM-0011903-00102) -> No action taken.
HKEY_CURRENT_USER\Control Panel\International\sTimeFormat (Trojan.FakeAlert) -> Bad: (HH:mm: VIRUS ALERT!) Good: (HH:mm:ss) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowControlPanel (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowRun (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowSearch (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowHelp (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowMyDocs (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowMyComputer (Hijack.StartMenu) -> Bad: (0) Good: (1) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuMorePrograms (Hijack.StartMenu) -> Bad: (1) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\StartMenuLogOff (Hijack.StartMenu) -> Bad: (1) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDrives (Hijack.Drives) -> Bad: (12) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoToolbarCustomize (Hijack.Explorer) -> Bad: (1) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSetFolders (Hijack.Explorer) -> Bad: (1) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr (Hijack.TaskManager) -> Bad: (1) Good: (0) -> No action taken.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\NoDispCPL (Hijack.DisplayProperties) -> Bad: (1) Good: (0) -> No action taken.

Dossier(s) infecté(s):
(Aucun élément nuisible détecté)

Fichier(s) infecté(s):
C:\WINDOWS\kgqfweltnfv.dll (Trojan.FakeAlert) -> No action taken.
C:\WINDOWS\nqgpedlr.dll (Trojan.FakeAlert) -> No action taken.
C:\WINDOWS\efbd.exe (Trojan.FakeAlert) -> No action taken.
C:\WINDOWS\okmdepgb.dll (Trojan.FakeAlert) -> No action taken.
C:\WINDOWS\mrvtdpqe.exe (Trojan.FakeAlert) -> No action taken.
C:\WINDOWS\axrfgvek.dll (Trojan.FakeAlert) -> No action taken.
C:\Documents and Settings\Peyo\Bureau\Spyware&Malware Protection.url (Rogue.Link) -> No action taken.
C:\Documents and Settings\Peyo\Bureau\Privacy Protector.url (Rogue.Link) -> No action taken.
C:\Documents and Settings\Peyo\Bureau\Error Cleaner.url (Rogue.Link) -> No action taken.
C:\Documents and Settings\Peyo\Favoris\Error Cleaner.url (Rogue.Link) -> No action taken.
C:\Documents and Settings\Peyo\Favoris\Privacy Protector.url (Rogue.Link) -> No action taken.
C:\Documents and Settings\Peyo\Favoris\Spyware&Malware Protection.url (Rogue.Link) -> No action taken.

encore une fois merci beaucoup